音標練習：English vowel sound /O/ and /EI/（英語視頻）

來源: 婉蕠於 2009-09-22 14:26:21 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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音標練習：English vowel sound /O/ and /EI/（英語視頻）

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